Spring.



No. 763,505. PATENTED JUNE 28, 1904.

M. NABBR. SPRING.

APPLICATION FILED JUNE 18, 1903.

N0 MODEL.

I @LQM UNTTED STATES Patented June 28, 1904,

PATENT OEETCE.

MOSES H. NABER, OF CHICAGO, ILLINOIS, ASSIGNOR TO NABER SPRING COMPANY,OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SPRING.

SPECIFICATION forming part of Letters Patent No. 763,505, dated June 281904.

Application filer. June 18, 1903. Serial No. 161,980. (No model.)

To a whom it may concern.-

Be it known that I. Moses H. NABER, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Springs, of which thefollowing is a specification.

This invention relates to improvements in that class of springattachments employed with platform rocking-chairs. Heretofore, so far asI am aware, such springs have been so made as to necessitate the use ofbrackets for securing the ends of the springs to the rocking-chair andstationary base members.

One of the objects of my invention is to dispense with these brackets,thereby not only reducing the cost of manufacture, but also simplifyingthe structure.

A further object is to provide a rockingchair spring comprising a pairof parallel laterally-spaced compressible coils made of a single strandof wire.

The above and further objects of the invention are fully explained inthe accompanying specification, and the novel features of the same arepointed out in the appended claims.

In the drawings, Figure 1 is asectional elevation showing the inside ofthe rocker and base-rail of a rocking-chair provided with my invention.Fig. 2 is a section on the line 2 2 of Fig. 1, and Fig. 3 is a sideelevation of a modification of the invention.

In Fig. 1 the spring attachment is shown in connection with arocking-chair, A designating the rocker member, B the stationary basemember, and C the bars connecting the opposite sides of the base.

The invention consists generally of a pair of vertically-disposedlaterally-spaced coilsprings 10 and 11, made from a single strand ofspring-wire and connected by a horizontal portion 12. More specifically,as shown in Figs. 1 and 2, the strand of wire is formed with the centralhorizontal connecting-arm 12, at the ends of which are provided eyes 13and 14, formed by bending the wire into vertical loops parallel with theside of the rocker member A. The ends are then carried downwardly andforwardly past the part 12, as at 15, and wound into the vertical coils10 and 11. In the construction illustrated these coils are wound inopposite directions and extend outwardly from the loops. This is notregarded as material,however, as the coils may be wound in the samedirection or reversely or in any other manner desired. The extremitiesof the wire are carried rearwardly and formed into eyes 16 and 17, whichare disposed at the rear of each coil and in the same plane as the coils13 and l4t, as shown in Fig. 2, and preferably on the longitudinal axisof the springs, as shown in Fig. 1. The eyes 13, 14c, 16, and 17 beinglocated at the rear side of the coils and laterally with referencethereto and extending in a plane parallel with the plane of the side ofthe rocker, a firm bearing is provided, whereby the ends of the springsmay be held securely against the rocker and base members of the chairwhen secured by the nuts 18, screwing on bolts 19, passing through therespective chair members and the eyes. The attaching-eyes are offset orlocated laterally with reference to the coils, which, therefore, whenthe spring is in use are spaced from the rocker members, as shown inFig. 2. This avoids contact between the rocker members and the coils andthe consequent friction which would be incident to the rubbing of therocking member against the side of the coils. In order to preventpivotal movement of the springs on the securingbolts and consequentloosening of the parts, the extremities of the wire may be extendedinwardly along the base-rail and provided with other eyes, as 20, (shownin dotted lines in Fig. 1,) adapted to be fastened by bolts and nuts,thereby furnishing additional though not essential securing means forthe spring.

Preferably the spring attachment is secured to the rocker and basemembers with its front coil 10 located substantially on the verticalmedian line thereof, the rear coil 11 then being disposed nearer therear of the chair members. The advantage of this arrangement is thatwhile the rocker member is maintained with its seat in a substantiallyhorizontal position under normal conditions the spring 11 is locatedwhere it will be most efleetive either when rocking backward or forward,in the former case the spring compressing and in the latter expanding,as will be readily understood. Furthermore, the lower attachingeyes 16and 17 being located on the central line with respect to the expansionand contraction of the springs distortion of the latter is prevented andany tendency of the springs to creak is avoided.

The invention may be embodied in various forms, and in Fig. 3 I haveshown one of the many possible modifications. In this construction thesecuring-eyes are omitted and in lieu thereof attaching-clips areemployed. The horizontal arm 12 is provided with down wardly-bentportions 15, which run into the Y coils 10 and 11*, similar to the coils10 and 11 in Fig. 1. The portion 12 is provided with a clip 21,inclosing the same and having apertures 22, through which securing boltsor screws may be passed to fasten the upperends of the springs to therocker member A. The extremities are provided with inward extensions 23,which are fastened to the base member by clips 24. In order to moresecurely fasten the ends, they are preferably provided with the angularextensions 25, fitting in corresponding grooves in the clips 24.

Having described my invention, what I claim is- 1. As an article ofmanufacture, a rockingchair spring made from a single strand of wire andcomprising a pair of vertical laterally-spaced coils connected by ahorizontal portion provided with an attaching-eye adjacent each coil,the extremities of the strand beyond the coils also being provided withattaching-eyes, and all the attaching-eyes being located in the samevertical plane and on corresponding sides of the coils.

2. .As an article of manufacture, a rockingchair spring made from asingle strand of I MOSES H. NABER.

Vitn esses:

E. MOLITOR,

, JPIVICROBERTS.

